Question

270 270 264 240 180 what is the next number n this number series

Answer 1

Hello, the pattern is that you are adding and then subtracting half as you go along. 

Half of 240 is 120, so 240 plus 120 = 360
Half of 360 is 180, so 360 minus 180 = 180
Half of 180 is 90, so 180 plus 90 = 270
Half of 270 is 135, so 270 minus 135 = 135.